CN113311741B - Electronic switch controlled transmitter multiplexing system and application thereof - Google Patents
Electronic switch controlled transmitter multiplexing system and application thereof Download PDFInfo
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- CN113311741B CN113311741B CN202110477551.7A CN202110477551A CN113311741B CN 113311741 B CN113311741 B CN 113311741B CN 202110477551 A CN202110477551 A CN 202110477551A CN 113311741 B CN113311741 B CN 113311741B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The invention provides a transmitter multiplexing system controlled by an electronic switch and application thereof, wherein the transmitter multiplexing system comprises: the invention relates to a transmitter, which comprises a DSP control unit, a signal isolation circuit, a switch control signal generation circuit, a drive circuit, a switch circuit, a transmitter drive and power amplification circuit and a transducer group, wherein one end of the switch control signal generation circuit is connected with the DSP control unit through the signal isolation circuit, the other end of the switch control signal generation circuit is connected with the switch circuit through the drive circuit, the switch circuit is connected with the transducer group, one end of the transmitter drive and power amplification circuit is connected with the DSP control unit, and the other end of the transmitter drive and power amplification circuit is coupled with the switch circuit and the transducer.
Description
The technical field is as follows:
the invention relates to the technical field of acoustic Doppler current meters, in particular to a transmitter multiplexing system controlled by an electronic switch and application thereof.
Background art:
in an acoustic doppler velocimeter system, an acoustic doppler velocimeter transmitter system can only provide a transmit voltage at one frequency when providing a transmitter voltage to one or more transducers. If there are multiple transducers of different frequencies in an acoustic doppler velocimeter system, multiple transmitter systems are required to provide transmit voltages to the transducers of different frequencies. The acoustic Doppler current meter system also needs Doppler current meters with different frequencies to intermittently acquire flow velocity and flow information at the same place, and at present, a plurality of acoustic Doppler current meters with different frequencies are mostly adopted to meet the requirement, so that the cost is greatly increased; or a plurality of transmitter and receiver systems are adopted in one acoustic Doppler current meter, so that the volume and the cost of the acoustic Doppler current meter are increased.
Accordingly, there is a need to develop an electronic switch controlled transmitter multiplexing system that addresses the deficiencies of the prior art to solve or mitigate one or more of the problems set forth above.
Disclosure of Invention
In view of this, the present invention provides a transmitter multiplexing system controlled by an electronic switch and an application thereof, which can transmit a voltage signal with a frequency required by a transducer entering into a working state under the control of a control system, and drive the transducers with four frequencies in a time-sharing manner.
In one aspect, the present invention provides an electronic switch controlled transmitter multiplexing system, comprising: DSP the control unit, signal buffer circuit, on-off control signal produces circuit, drive circuit, switch circuit, transmitter drive and power amplification circuit and transducer group, on-off control signal produces circuit one end and passes through signal buffer circuit and connect DSP the control unit, and the other end passes through drive circuit and connects switch circuit, switch circuit and transducer group link, DSP the control unit is connected to transmitter drive and power amplification circuit one end, and the other end is coupled with switch circuit and transducer simultaneously.
The above aspects and any possible implementations further provide an implementation IN which the DSP control unit is configured to output a selection signal IN1, a selection signal IN2, an enable signal EN, a driving signal Q +, and a driving signal Q-.
As with the above-described aspect and any possible implementation, there is further provided an implementation IN which the signal isolation circuit is configured to perform power ground isolation processing on the selection signal IN1, the selection signal IN2, and the enable signal EN.
The above aspects and any possible implementations further provide an implementation IN which the switch control signal generation circuit is configured to change the selection signal IN1, the selection signal IN2, and the enable signal EN into four switch control signals through an analog switch.
In the aspect and any possible implementation manner described above, there is further provided an implementation manner in which the switch control signal generation circuit is provided with a U2 analog switch, a 4:1 multiplexer, and resistors R1 to R5.
In the aspect and any possible implementation manner described above, an implementation manner is further provided, in the switch control signal generation circuit, the resistor R1 is a resistor with a resistance value of 120 ohms and a precision of 1%, and the resistors R2 to R5 are resistors with a resistance value of 10 kohms and a precision of 1%.
The method according to the above aspect and any possible implementation manner further provides an implementation manner that the 4:1 multiplexer is ADG1604BRUZ, and can output the 12V driving signal IN a time-sharing manner under the control of the selection of the 5V level signal IN-1, IN-2 and the isolated selection signal SHD.
The above aspect and any possible implementation further provide an implementation in which the transducer array is used in an acoustic doppler velocimeter, the transducer array including four transducers of different frequencies.
The above aspects and any possible implementations further provide an implementation in which the transmitter driving and power amplifying circuit is configured to amplify the driving signal Q + and the driving signal Q-.
The above aspects and any possible implementation manners further provide an implementation manner, and an application of an electronic switch controlled transmitter multiplexing system, which is used for realizing that four transducers with different frequencies in an acoustic doppler current meter provide transmission voltages in a time-sharing manner.
Compared with the prior art, the invention can obtain the following technical effects: the transmitter multiplexing system can realize time-sharing output of transducer driving voltage signals with different frequencies by adopting partial electronic devices, can greatly reduce the volume and the circuit board size of the multi-frequency acoustic Doppler current meter, and reduces the manufacturing cost of the multi-frequency acoustic Doppler current meter.
Of course, it is not necessary for any one product in which the invention is practiced to achieve all of the above-described technical effects simultaneously.
Description of the drawings:
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a system block diagram of a transmitter multiplexing system provided by an embodiment of the invention;
fig. 2 is an isolation circuit diagram of a transmitter multiplexing system according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a switch control signal generating circuit of a transmitter multiplexing system according to an embodiment of the present invention;
fig. 4 is an overall circuit diagram of a transmitter multiplexing system according to an embodiment of the present invention.
[ detailed description ] A
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The invention provides a transmitter multiplexing system controlled by an electronic switch and application thereof, which can transmit voltage signals with frequencies required by transducers entering a working state under the control of a control system and drive the transducers with four frequencies in a time-sharing manner.
Fig. 1 shows a system block diagram of a transmitter multiplexing system of the present invention, which includes: DSP the control unit, signal isolation circuit, on-off control signal produces circuit, drive circuit, switch circuit, transmitter drive and power amplification circuit and transducer group, on-off control signal produces circuit one end and passes through signal isolation circuit connection DSP the control unit, and the other end passes through drive circuit connection switch circuit, switch circuit and transducer group link, DSP the control unit is connected to transmitter drive and power amplification circuit one end, and the other end is coupled with switch circuit and transducer simultaneously. The DSP control unit is used for outputting a selection signal IN1, a selection signal IN2, an enable signal EN, a driving signal Q + and a driving signal Q-.
The signal isolation circuit is used for carrying out digital isolation processing on the selection signal IN1, the selection signal IN2 and the enable signal EN to realize front and back power ground isolation, and since the front-end signal comes from the DSP control unit and the back signal generates control logic signals of the driving signal, namely a driving signal Q + and a driving signal Q-, strong interference signals exist on the ground wire of the circuit, the isolation circuit is needed. The enable signal EN is used for controlling whether the transmitter driving circuit works or not, and meanwhile the other function of the enable signal EN is to turn on the triode to charge the high Bian Dianrong of the four electronic switch driving circuits during the multiplexing stop working period of the transmitter.
The switch control signal generating circuit is used for converting a selection signal IN1, a selection signal IN2 and an enable signal EN into four switch control signals through an analog switch. The switch control signal generating circuit is provided with a U2 analog switch, a 4:1 multiplexer and resistors R1-R5. The resistor R1 in the switch control signal generating circuit is a resistor with the resistance value of 120 ohms and the precision of 1%, and the resistors R2-R5 are resistors with the resistance value of 10k ohms and the precision of 1%. The 4:1 multiplexer is ADG1604BRUZ, and can output 12V driving signals IN a time-sharing manner under the selection of 5V level signals IN-1 and IN-2 and the control action of SHD, wherein SHD is the selection signal after isolation.
The transducer group is used for an acoustic Doppler current meter and comprises four transducers with different frequencies.
And the transmitter driving and power amplifying circuit is used for amplifying the driving signal Q + and the driving signal Q-.
The application of the transmitter multiplexing system controlled by an electronic switch is used for realizing that four transducers with different frequencies in an acoustic Doppler current meter provide transmitting voltage in a time-sharing manner.
The working principle of the invention is that the transmitter control signals Q + and Q-sent by the DSP control system control the full-bridge inverter circuit to drive the transformer to work after passing through the isolation and drive circuit. The transducers 1 to 4 are four transducers with different frequencies, signals IN1 and IN2 output by the DSP system select one of the switch circuits 1-4 to be closed, and the transmitter system can provide transmitting voltage for the transducer connected with the switch circuit.
The invention comprises the following steps:
the signal isolation circuit, because the control circuit and the rear end working power supply are not IN common, the selection signals IN1 and IN2 and the enable signal EN need to pass through the isolation circuit before entering the next stage circuit. The signal isolation circuit is shown in fig. 2.
And a switch control signal generation circuit, four switch control signals being generated by the enable signals SHD and IN-1, IN-2. A circuit diagram of the switch control signal generating circuit is shown in fig. 3.
U2 is an analog switch, and the ADG1604BRUZ selected IN the invention is a 4:1 multiplexer which can output 12V driving signals IN a time-sharing way under the selection of 5V level signals IN-1 and IN-2 and the control action of SHD. The resistor R1 is a resistor with a resistance of 120 ohms with an accuracy of 1%. The resistors R2-R5 are resistors with a resistance value of 10k ohm and a precision of 1%.
The transmitter multiplexing system of the invention specifically works according to the following principle:
when the transmitter operates, the enable signal SD maintains a low level. When the transmitter stops operating, the enable signal remains high. SHD coincides with SD level.
Taking the working condition of the first switch circuit as an example, when the transmitter works, the first switch needs to be turned on to provide a working voltage for the transducer a of 300k, G1_ on is at a high level, and SHD is at a low level. U2 has pin 7 HO outputting high level relative to pin 6 VS, M1 and M2 are NMOSFETs, high level is applied to gate electrodes thereof, M1 and M2 are in an on state, and the secondary voltage of the transformer T1 is applied to the transducer A through M1 and M1. With SHD low, U2 has its 5-pin LO low relative to HGND, and Q1 is an NMOSFET, with Q1 in the off state when Q1 is off with the pin 1 asserted low.
When the transmitter stops working, SHD is at high level, 5 pin LO of U2 outputs high level Q1 to HGND to be in on state, 6 pin VS of U2 is connected to HGND, +12V charges capacitor C28 through diode D11 to prepare for the next switch on.
The capacitances of the capacitors C27 and C28 were 4.7uF and withstand voltage was 25V. Integrated circuit U2 is IR2101S.
IR2101S is a 600V high and low side gate driver for IGBTs and MOSFETs with input and output in the same direction. D11 is diode 1N4007. The resistance of the resistor R19 is 5.1 ohms. D12 is a diode 1N4001 that provides a fast current bleed path when M1 and M2 are off. Z1 is a bidirectional TVS diode that protects M1 and M2 at the instant M1 and M2 turn off, so that the voltage across it is limited within a safe range.
It should be noted that the ac electronic switch entering the operating state is turned on before the transmitter circuit starts operating, and turned off after the transmitter circuit stops operating.
The above details a transmitter multiplexing system controlled by an electronic switch according to an embodiment of the present application. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
As used in the specification and claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of additional like elements in a commodity or system comprising the element.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (3)
1. An electronically switch controlled transmitter multiplexing system, comprising: the device comprises a DSP control unit, a signal isolation circuit, a switch control signal generation circuit, a driving circuit, a switching circuit, a transmitter driving and power amplification circuit and a transducer group, wherein one end of the switch control signal generation circuit is connected with the DSP control unit through the signal isolation circuit, the other end of the switch control signal generation circuit is connected with the switching circuit through the driving circuit, the switching circuit is connected with the transducer group, one end of the transmitter driving and power amplification circuit is connected with the DSP control unit, and the other end of the transmitter driving and power amplification circuit is coupled with the switching circuit and the transducer;
the DSP control unit is used for outputting a selection signal IN1, a selection signal IN2, an enable signal EN, a driving signal Q + and a driving signal Q-;
the signal isolation circuit is used for carrying out power ground isolation processing on the selection signal IN1, the selection signal IN2 and the enable signal EN;
the switch control signal generating circuit is used for converting a selection signal IN1, a selection signal IN2 and an enable signal EN into four switch control signals through an analog switch;
the switch control signal generating circuit is provided with a U2 analog switch, a 4:1 multiplexer and resistors R1-R5;
the resistor R1 in the switch control signal generating circuit is a resistor with the resistance value of 120 ohms and the precision of 1%, and the resistors R2-R5 are resistors with the resistance value of 10k ohms and the precision of 1%;
the 4:1 multiplexer is ADG1604BRUZ, and can output a 12V driving signal IN a time-sharing manner under the control action of selection of 5V level signals IN-1 and IN-2 and an isolated selection signal SHD;
the transducer group is used for an acoustic Doppler current meter and comprises four transducers with different frequencies;
when the transmitter stops working, the enabling signal SD keeps high level;
when the transmitter stops working, the SHD is at a high level, the 5 pin LO of the U2 outputs a high level relative to the HGND, the NMOSFET Q1 is in an on state, the 6 pin VS of the U2 is connected to the HGND, and the +12V charges the capacitor C28 through the diode D11 to prepare for the next switching on.
2. The transmitter multiplexing system of claim 1, wherein the transmitter driving and power amplifying circuit is configured to amplify the driving signal Q + and the driving signal Q-.
3. Use of an electronically switch controlled transmitter multiplexing system comprising a transmitter multiplexing system according to any of the preceding claims 1-2 for implementing four transducers of different frequencies in an acoustic doppler velocimeter for time-sharing provision of transmit voltages.
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| CN202110477551.7A CN113311741B (en) | 2021-04-29 | 2021-04-29 | Electronic switch controlled transmitter multiplexing system and application thereof |
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| CN202110477551.7A CN113311741B (en) | 2021-04-29 | 2021-04-29 | Electronic switch controlled transmitter multiplexing system and application thereof |
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| CN113311741B true CN113311741B (en) | 2023-03-31 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102362196A (en) * | 2009-03-23 | 2012-02-22 | Ysi公司 | Multi-frequency, multi-beam acoustic doppler system |
| CN107786283A (en) * | 2016-08-30 | 2018-03-09 | 通用电气公司 | Transmitter-receiver device and ultrasonic system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5893363A (en) * | 1996-06-28 | 1999-04-13 | Sonosight, Inc. | Ultrasonic array transducer transceiver for a hand held ultrasonic diagnostic instrument |
| CN201516046U (en) * | 2009-07-14 | 2010-06-30 | 汕头市超声仪器研究所有限公司 | Medical ultrasonic B front terminal excitation device |
| USRE47996E1 (en) * | 2009-10-09 | 2020-05-19 | Ethicon Llc | Surgical generator for ultrasonic and electrosurgical devices |
| CN206389284U (en) * | 2016-12-19 | 2017-08-08 | 江苏中海达海洋信息技术有限公司 | A kind of multibeam echosounder multichannel phase control emission machine |
| CN211554705U (en) * | 2020-03-25 | 2020-09-22 | 中国计量大学 | Multichannel ultrasonic transmitting circuit |
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- 2021-04-29 CN CN202110477551.7A patent/CN113311741B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102362196A (en) * | 2009-03-23 | 2012-02-22 | Ysi公司 | Multi-frequency, multi-beam acoustic doppler system |
| CN107786283A (en) * | 2016-08-30 | 2018-03-09 | 通用电气公司 | Transmitter-receiver device and ultrasonic system |
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